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LM25118-Q1: LM25118-Q1: CSD17309Q3 MOSFET issue

Part Number: LM25118-Q1
Other Parts Discussed in Thread: LM25118, CSD17309Q3

Hello TI, I have some problem with LM25118Q1MH/NOPB buck boost circuit from Webench, every thing working good but CSD17309Q3 MOSFET which is the boost MOSFET damaged in many board almost in 30% of the boards in nonunderstanding way spatially after short circuit, which I think LM25118 can handle it. Note that we already replace it by CSD18532 and still the same issue. 
Please check the following schematic:

  • Hi Anas,

    Thanks for using the e2e forum.
    Due to a conference, responses currently may get delayed a bit.
    I will look into your this case and get back to you by tomorrow.

    In the meantime, could you please fill in the excel calculator for LM25118?

    Thanks for your patience.

    Best regards,

  • Hi Anas,

    There would be one additional question from my side.
    Could you describe the failure in more details?
    From what I understand, one of the low side FET shows damage. The other FET is still working?
    Would it be possible to take some measurements on a non-damaged board to check the gate voltage and switch note voltage?
    This way we can check if there might be possible overvoltages at the FET.

    Thanks and best regards,